Deformation microstructures and textures of some cold rolled Mg alloys

Barnett, Matthew; Nave, Mark; BETTLES, C

doi:10.1016/s0921-5093(04)00942-6

Cited by 475 publications

(185 citation statements)

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“…(Nave and Barnett, 2004;Barnett et al, 2004b;Keshavarz and Barnett, 2006;Cizek and Barnett, 2008;Al-Samman and Gottstein, 2008). However, traces of these types of twins are only observed in very small regions, often very close to the fracture surfaces.…”

Section: Finite Element Discretizationmentioning

confidence: 99%

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Fernández

Prado

Wei

et al. 2011

International Journal of Plasticity

104

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a b s t r a c tLightweight magnesium alloys, such as AZ31, constitute alternative materials of interest for many industrial sectors such as the transport industry. For instance, reducing vehicle weight and thus fuel consumption can actively benefit the global efforts of the current environmental industry policies. To this end, several research groups are focusing their experimental efforts on the development of advanced Mg alloys. However, comparatively little computational work has been oriented towards the simulation of the micromechanisms underlying the deformation of these metals. Among them, the model developed by Staroselsky and Anand [Staroselsky, A., Anand, L., 2003. A constitutive model for HCP materials deforming by slip and twinning: application to magnesium alloy AZ31B. International Journal of Plasticity 19 (10), 1843-1864] successfully captured some of the intrinsic features of deformation in Magnesium alloys. Nevertheless, some deformation micromechanisms, such as cross-hardening between slip and twin systems, have been either simplified or disregarded. In this work, we propose the development of a crystal plasticity continuum model aimed at fully describing the intrinsic deformation mechanisms between slip and twin systems. In order to calibrate and validate the proposed model, an experimental campaign consisting of a set of quasi-static compression tests at room temperature along the rolling and normal directions of a polycrystalline AZ31 rolled sheet, as well as an analysis of the crystallographic texture at different stages of deformation, has been carried out. The model is then exploited by investigating stress and strain fields, texture evolution, and slip and twin activities during deformation. The flexibility of the overall model is ultimately demonstrated by casting light on an experimental controversy on the role of the pyramidal slip hc + ai versus compression twinning in the late stage of polycrystalline deformation, and a failure criterion related to basal slip activity is proposed.

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Section: Finite Element Discretizationmentioning

confidence: 99%

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Fernández

Prado

Wei

et al. 2011

International Journal of Plasticity

104

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“…Yapılan pek çok çalışmada korozyon dirençleri de incelenmiştir. Yttrium ilavesinin sürünme direncini artırdığı ve bu konuda Mn ve Al den daha etkili olduğu, tane sınırlarında zengin faz oluşturduğu [21][22][23], %0.2 Ce ilavesinin saf Mg ve Mg-3Al-1Zn alaşımına göre daha kolay haddelenebilir olduğu [24], homojenleştirme ve ekstrüzyon şartlarının iyileştirilmesinin mikro yapıyı iyileştirdiği ve şekillendirilebilirliği artırdığı [25][26] açıklanmıştır.…”

Section: Magnezyum Alaşimlari Ve Ağirlik Kazanciunclassified

Magnezyum Alaşimlari Ve Kullanim Alanlarinin İncelenmesi̇

Öztürk

Kaçar

2016

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZETMagnezyum alaşımlarının havacılık, uzay ve otomotiv endüstrisinde yapısal malzeme olarak kullanımı gün geçtikçe artmaktadır. Henüz yaygın kullanımda olmaması ve üretiminin pahalı olması nedeniyle üreticilerin sayısı demir ve çelik üreticilerine göre çok daha azdır. Bu durum magnezyum alaşımlarının pahalı olmasının temel sebeplerinden biridir. Bu çalışmada, magnezyum ve alaşımlarının imalat yöntemleri, şekillendirilebilirlik, korozyon direnci, çevreye olan etkileri ve mevcut kullanım alanları incelenmiştir.Anahtar Kelimeler: Magnezyum, magnezyum alaşımları, hafif malzemeler. INVESTIGATION OF MAGNESIUM ALLOYS AND THEIR APPLICATIONS ABSTRACTThe use of magnesium alloys in aerospace, space, and automotive industry as structural materials has gradually been increased. Magnesium alloys producers are much less than the iron and steel producers in number due to the alloys are still not widely used and their production cost are high. This is one of main reasons that the prices of the alloys are expensive. In this study, the manufacturing techniques, formability, corrosion resistance, environmental effects of magnesium and its alloys and applications were investigated.

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“…The third way to improve the mechanical behaviour of Mg alloys is based on modifying the texture, which has an important influence on the ductility and on the plastic anisotropy [31][32][33][34][35][36][37][38][39][40][41][42]. Depending on the processing route followed, different types of textures are obtained.…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the processing route followed, different types of textures are obtained. For example, a random texture results from casting and a basal fibre texture develops after hot rolling [31][32][33]. During extrusion, the c-axes align perpendicular to the extrusion direction.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermomechanical processing on the grain size, texture and mechanical properties of Mg-Al alloys

Srinivasarao¹,

Valle²,

Ruano³

et al. 2012

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The work carried out by the authors over the last decade on the processing, microstructural characterization and the mechanical behaviour of Mg alloys is reviewed. In particular, the potential for grain refinement and for the development of specific textures of large strain hot rolling (LSHR), equal channel angular pressing (ECAP) and accumulative roll bonding (ARB) is discussed. The recrystallization and the deformation mechanisms predominant in Mg alloys are analysed as a function of the grain size and the texture in a wide range of stresses, strain rates and temperatures. Finally, the feasibility of superplastic forming of Mg alloys was examined, taking into account the influence of factors such as grain size stability and microstructural heterogeneities.K e y w o r d s : magnesium alloys,

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Deformation microstructures and textures of some cold rolled Mg alloys

Cited by 475 publications

References 0 publications

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Continuum modeling of the response of a Mg alloy AZ31 rolled sheet during uniaxial deformation

Magnezyum Alaşimlari Ve Kullanim Alanlarinin İncelenmesi̇

Influence of thermomechanical processing on the grain size, texture and mechanical properties of Mg-Al alloys

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